?? ?????4.8??? ???????
????:1?????????,??????:????
2??????????
3?????
4???????????
5?????????????
???????????????12???20????????? (?????????????????? ??)???????20?????????????,??????????????????,????????????????,??????????????????,?4.8?????????????,?????
12??????????20??????????????,??????????????????????????“???,??,????????????1000????????(?,????????????????)??400???”????????????,???,?3.76??????,??????????????130?????16????,???????????????143????,???173???,???????
?????,???(????????????????????????????),??????????????????????????“??????????????????”????,????????????“????”????????????????????“?????123???,???????????????????????????”
????????????,????????????7??????????,??????4???????????,?????????????“?6-8?????????????,?????????,????????,??????”??????????????,????????83??,??????
???????????????????,??????????????????,?????????????,???????????????,?????????????5????????????,??????700?????????????????????,?????15?,????????????????
“??????????,?????????????????,??????????????,????????????”??????????????,?????,????,?,???,?????,????????????????????????????4??(?)
?????:???